Death:Death, Cause unspecified 23 October 2017 (Age 80) chart Placidus Equal_H.
American mathematician best known for his work in group theory. Together with Donald G. Higman he discovered the Higman–Sims group, one of the sporadic groups. The permutation group software developed by Sims also led to the proof of existence of the Lyons group (also known as the Lyons–Sims group) and the ONan group (also known as the ONan–Sims group). Sims died on 23 October 2017 at age 80. Link to Wikipedia biography Read less
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